Logger AOP

In the LoggerAOP class, using Spring AOP, intercept all calls to the public methods annotated with the LogExecution annotation, and call the log method on the logger field with the intercepted method's name as the data argument.

For example, calling the getNames method of the NameRepository class, which has LogExecution annotation, should print "getNames".

Java SE 13

Show starting code

import org.aspectj.lang.*;
import org.aspectj.lang.annotation.*;
import org.springframework.context.annotation.*;
import org.springframework.stereotype.Component;
import org.springframework.beans.factory.annotation.*;
import java.lang.annotation.*;
import java.util.*;

@Aspect
@Component
public class LoggerAOP {
    @Autowired private Logger logger;
    
    public void loggingAdvice(JoinPoint jp) {

    }
}

@Component
class NameRepository {
    @LogExecution
    public List<String> getNames() {
        List<String> names = new ArrayList<>();
        names.add("John");
        names.add("Mary");
        return names;
    }
}

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
@interface LogExecution {}

interface Logger {
    public void log(String data);
}

@Configuration
@EnableAspectJAutoProxy
@Import({LoggerAOP.class, NameRepository.class})
class Config {
    @Bean
    public Logger logger() {
        return (message) -> System.out.println(message);
    }
}

Example case: Wrong answer
logger will be invoked on methods annotated with LogExecution: Wrong answer
logger will be invoked only on public methods annotated with LogExecution: Wrong answer

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